Abstract
The excitation of the surface field and evanescent enhancement in the graphene have shown sensitive to the refractive index of surrounding media and potential applications in high-sensitivity biochemical sensing. In this paper, we investigate the graphene-coated microfiber Bragg gratings (GMFBGs) with different diameters for ammonia gas sensing. The maximum sensitivity with 6 pm/ppm was achieved experimentally when the microfiber’s diameter was about 10 μm. Moreover, by adjusting the diameter of the GMFBG, the sensing performance of the GMFBGs could be optimized. Experimental results indicated that GMFBGs with the diameter of 8 μm − 12 μm would show the characteristics of the high sensitivity, relative low attenuation, and large dynamic range.
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Zhang, A., Wu, Y., Yao, B. et al. Optimization study on graphene-coated microfiber Bragg grating structures for ammonia gas sensing. Photonic Sens 5, 84–90 (2015). https://doi.org/10.1007/s13320-014-0216-x
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DOI: https://doi.org/10.1007/s13320-014-0216-x